Water Reservoir

The removable tank that stores water for machines not plumbed directly into a water line.

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Parts that change the shot

What it means

The removable tank that stores water for machines not plumbed directly into a water line. It shapes placement and convenience, but it also means the user controls water quality directly. Neglecting the reservoir allows stale water and mineral issues to become part of the machine's daily behaviour.

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Where this leads

Each one pushes this into the cup, compares it, or helps you act on it.

Before the water hits

Puck

Hardware matters because it shapes the brew environment.

Think of the puck as the extraction environment, not just the spent material left after the shot.

Problems that show up later

Backflushing

Parts stay useful only when they stay clean.

Follow the maker's cleaning schedule and rinse thoroughly after detergent cycles.

How the shot starts

Pre-infusion

See where the component changes the first seconds of flow.

Use pre-infusion to smooth the beginning of the shot, not to compensate for careless preparation.

What people mean when they say "extraction"

Espresso Extraction

Translate parts into what changes in the cup.

Separate extraction from strength in your thinking. One asks how much was dissolved, the other how concentrated the drink feels.